JPH0532714Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The invention is generally applicable to automobiles, various machines,
The present invention relates to an improvement in the structure of a joint for connecting a hose to a relatively small metal pipe with a thickness of about 15 m/m or less, which is installed as a supply path for oil and air in equipment, etc.

[Conventional technology]

Conventionally, as this type of connection joint, for example, the third
As illustrated in the figure, a communication hole 25 is provided in the shaft core, a cylindrical wall 23 connecting to the hose is provided in a protruding manner, and an enlarged diameter tube is provided which communicates with the communication hole 25 provided in the cylindrical wall. The joint main body 21 includes a conical seat surface 24 at the bottom of the connecting screw wall 22, and a connecting portion such as a flare provided at the end of the metal pipe P is brought into contact with the seat surface, and The connection was configured such that the connection portion was clamped by tightening the screw to the screw wall 22.

[Problem that the invention attempts to solve]

However, in the case of such conventional connection joints, a large amount of pressing force is required due to mutual abutment due to surface contact on the seat surface 24, and the screw tightening operation is troublesome. In addition, the clamping pressure causes thin wall deformation and twisting in the flare part, leading to deterioration of mechanical strength. This can lead to cracks and damage, causing leaks.Furthermore, since the screws are tightened together, it is often difficult to connect them in tight spaces.Furthermore, since they are connected using tightening nuts, The shape of a metal tube that is generally long in the connection direction and has a bent portion near the connecting end has problems such as being subject to restrictions on the bending portion.

In order to extremely effectively solve the above-mentioned conventional problems, the present invention has an enlarged diameter mounting hole connected to the connecting cylinder wall with the hose, which has a flow hole penetrated through the shaft core, and at least one inward A bellows-shaped elastic sealing member having a curved pressure contact wall is installed inside the elastic sealing member, and the outer end circumferential side of the elastic sealing member is fixed to the vicinity of the end of the open cylinder wall, and the inner end circumferential side thereof is used as a free end. By configuring the joint body to be freely slidable, when connecting by inserting the elastic seal member into the shaft core of the tube body, the curved pressure contact wall portion can be brought into close contact with the outer peripheral surface of the tube body, and the assembly can be easily made. By configuring the pressure welding wall and the annular bulging wall on the pipe body side to engage with each other inside the attachment hole, troublesome connection operations such as screwing and tightening and the use of tools are unnecessary, and the narrow space can be reduced by simply inserting the connection. Connections can be made extremely easily and quickly even at any location, and there is no need to worry about deterioration of mechanical strength at the joint on the pipe body side.Furthermore, the joint body is relatively small and compact in shape, and has excellent elasticity. To propose a connecting joint that can increase the degree of freedom in the radial direction of a pipe body by increasing the compression margin of a sealing member, and can also be freely adjusted back and forth in the connection direction so that the connection can be made without difficulty. The purpose is to

[Means to solve the problem]

The present invention has a protruding cylindrical wall that connects to the hose on the tip side, a communication hole in the axial center of the protruding wall, and a step with an enlarged diameter that connects to the connecting cylindrical wall and connects the rear part to the communication hole. A rear end periphery of a bellows-shaped elastic seal member having at least one inwardly curved pressure contact wall is attached to the assembly hole portion of the joint body which is integrally provided with an open cylindrical wall serving as an assembly hole. The inner circumferential side is fixed to the vicinity of the end of the open cylinder wall so as to be internalized, and the inner circumferential side thereof is used as a free end to be slidable in the front-rear direction,
When connecting by inserting the pipe body into the assembly hole, the press wall portion is pressed tightly against the outer circumferential surface of the pipe body, and the pressure wall portion is located inside the press wall portion on the pipe body side. The gist of this is a joint for connecting a small diameter metal pipe and a hose, in which an outward annular bulging wall provided near the connection end is configured to be able to engage with a pressure wall. Furthermore, the elastic member is configured to have a corrugated cross section in the axial direction.

〔Example〕

Hereinafter, embodiments of the present invention will be described based on the drawings. Fig. 1 is a partially cutaway sectional view of a joint for connecting a thin metal pipe and a hose according to the present invention, and Fig. 2 is another embodiment. 1 is a view corresponding to FIG. 1 shown in the same figure, and 1 has a communication hole 5 penetrating through the shaft core, and a cylindrical wall 3 for connection with a rubber hose or a resin hose is provided protrudingly, and the cylindrical wall 3 is connected to the cylindrical wall. The joint body is integrally formed with an open cylindrical wall 4 whose enlarged diameter interior that communicates with the circulation hole 5 serves as the assembly hole 2.
This is a bellows-shaped elastic sealing member having an annular pressure wall 6' curved inward as shown in the figure. Further, the outer end circumferential side of the elastic seal member 6 is fixed 7 to the vicinity of the end of the open cylindrical wall 4 by caulking, adhesive, etc. to the assembly hole 2, and the inner end circumferential side thereof is fixed to the assembly hole 2 portion. It is installed as a free end slidable in the axial direction along the inner circumferential surface of the open cylinder wall 4. When connecting the tube P by inserting the elastic seal member 6 into the axial hole, the curved pressure contact wall 6' is brought into close contact with the outer peripheral surface of the tube P, and the inside of the assembly hole 2 is connected. The pressure contact wall and an annular bulging wall P' provided near the connection end on the tube body side are configured to engage with each other as they are freely adjusted rearward in the connection direction.

[Effect]

Since the present invention is configured in this way, when connecting, the annular bulging wall P' side provided near the connecting end of the tube P is inserted into the axial hole of the elastic sealing member 6. Pressure wall 6' of elastic sealing member
The bulge wall P' is tightly connected to the outer peripheral surface of the pipe, and by moving it slightly backward in the connection direction after insertion, the bulging wall P' is engaged with the pressure contact wall 6', and the elasticity is increased. The entire sealing member 6 is compressed and pressed against the opening end of the assembly hole 2,
This makes the tight fit of the pressure contact wall 6' to the outer circumferential surface of the tube body P even more reliable.

[Effect of idea]

As explained above, the joint for connecting a small diameter metal pipe and a hose according to the present invention has a
A bellows-shaped elastic sealing member having at least one inwardly curved pressure wall is installed inside the elastic sealing member, and the outer end circumferential side of the elastic sealing member is fixed 7 near the end of the open cylinder wall 4, and the inner end Since it is configured to be slidable with the peripheral side as a free end, when connecting the pipe body P, it is possible to connect the pipe body P by simply inserting it into the shaft core hole of the elastic seal member 6, without the need for tools or the like. It can be connected easily and quickly anywhere, eliminating the hassle of connection operations, and the pipe P
There is no need to worry about mechanical strength deterioration at the side connections.
Furthermore, the product shape can be made small and compact, and the compression margin of the elastic seal member 6 is increased to prevent differences in the outer diameter of the tube P, deviations in outer diameter roundness, and eccentricity with respect to the joint body 1. This is an extremely useful connection between a small-diameter metal pipe and a hose, which allows for a large degree of freedom in the radial direction by absorbing the connections of This is a practical joint.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway sectional view of a joint for connecting a small diameter metal pipe and a hose, showing an embodiment of the present invention;
The figure is a view corresponding to FIG. 1 showing another embodiment, and FIG. 3 is a partially cutaway sectional view of the conventional example before connection. DESCRIPTION OF SYMBOLS 1... Joint body, 2... Assembly hole, 3... Connecting cylinder wall, 4... Opening cylinder wall, 5... Distribution hole, 6... Elastic sealing member, 6'... Pressure contact wall, 7... Fixation, P
... tube body, P′ ... bulging wall.

Claims (1)

[Claims for Utility Model Registration] A cylindrical wall 3 connecting to the hose is provided protrudingly on the tip side, and a communication hole 5 is provided in the shaft core thereof, and the rear portion is connected to the connecting cylindrical wall and connected to the communication hole. A cylindrical annular shape having at least one pressure contact wall 6' curved inward at the assembly hole portion of the joint body 1, which is integrally provided with an open cylindrical wall 4 serving as a stepped assembly hole 2 with an enlarged diameter that communicates with the joint body 1. The rear end peripheral side of a bellows-shaped elastic seal member 6 is fixed 7 to the vicinity of the end of the open cylinder wall 4 so as to be internalized, and the inner peripheral side thereof is used as a free end to be slidable in the front-rear direction. , when connecting by inserting the pipe body P into the assembly hole 2, the pressure contact wall 6'
an annular outwardly bulging wall P' portion which is tightly pressed against the outer circumferential surface of the tube body, and which is located inward from the press-contact wall portion and provided near the connecting end on the side of the tube P; A joint for connecting a small diameter metal pipe and a hose, characterized in that the joint is configured to be able to be engaged with a pressure contact wall 6'. (2) The joint for connecting a small diameter metal pipe and a hose according to claim 1, wherein the elastic member 6 is configured to have a corrugated cross section in the axial direction.